Valve



W. E. KING Sept. 6, 1832.

VALVE Filed Jan. 15. 1929 w M 6 INVENTOR- BY MM ATTORNEYS.

amass 6.1932.

U ITED STATES PATENT orrlca WALTER 8. KING, OI HOUB 'IOI', M AQSIGNOB 1'0 3'. 8. nnacaonm,

ruse vnva l Application fled January 1|, me. man Io. man.

My invention relates to valves or similar devices constructed to regulate or control the passage of fluid through a conducting pipe.

It is often desirable to rovide a valve controlling the flow of flui through 'a passage so as to allow flow in either direction and it is an object of this invention to construct a valve which will be normall closed but which is adapted to automatica y open under a predetermined pressure from e ther side to allow fluid to pass from the pressure side thereof.

I also desire to form the valve structure so that it may be normall closed, when desired, to shut ofl the flow o fluid in either direction. Although m device-has a wide application, I contemp ate employing the same in connection with a fluid operated piston or operating ram so that when the fluid pressure reaches a certain predetermined value the valve will open to release the excess pressure.

In case of use on a line for conducting fluid underpressure, I contemplate employing, in connection with the gate valve or other device for'closing the passage of fluid through the line, a by-pass for fluid from the pressure side or upstream side of the passage to the outer side of the gate valve so that the I pressure will be equalized on both sides thereof. This will enable the gate valve to be easily closed.

My present improvement is a valve to be used in the by-pass of an apparatus of the character mentioned or in similar situations.

I aim to rovide a valve for fluid conducting lines which is normally closed but which may be unseated by fluid under a predeter for engagement with a pi My invention is adapted to be employed with diflerent types of valves. The one shown in the drawing is merely illustrative of the inventive idea. The valve body 1 is a tubular valve fitting of ordinar construction having the end 2 threaded or engagement with a pipe leading to a passage or w ev fluid 'under pressure. The fitting is of L shape and the lateral opening 3 is threaded leading from the rearwa side of the va ve which tends to close the flow of fluid from the pipe connected at 2. [The interior of the valve body forms a passage-4 for fluid and a chamber 5 for the valve is formed centrally of the body.

The passage 4 is closed at one end by a plug 6, which has a threaded connection with the body and is of tubular construction, the in terior passage bein threaded at 7 for engagement with a t readed portion of the valve stem 8. The outer end of the plug 6 has a recess 9 therein to receive compressible packing which may be tightened about the valve stem 8 by means of a gland 10 and ca 11.

e valve stem 8 projects into thepassage 4 and through the valve chamber 5. The passage has a valve seat 12 adjacent the passage 4 and the valve 13 is mounted upon a valve stem to fit said seat. The valve stem hasa head thereon formed at 14 and beyond this head the stem is reduced at 15 to receive the valve 13 and a slidable valve member 16.

The valve member 16 is slidable on the re duced stem 15 and is beveled at one end tofit within a valve seat 17 at the outer end ofa passage 19 through the valve member 13. The opposite end of the passage through the valve as a seat 20 which may fit against the beveled face of the head 14 upon the valve stem. A spring 22 on the portion 15 of the valve stem bears against the head 14 at one end and against the bearing portion of the valve 13 at the other end and thus tends to iigld the said valve resiliently against the seat The valve member 16 which closes the passage through the valve 13 is held in contact with the said valve 13 by means of a spring 23 hearing against said valve 16 at one end 'one'of the valves.

.ponderance of fluid pressure in the passage 4 23, the preponderance of pressure tendin to hold the valve 13 in the seat 12. At the same time the spring 23 holds the valve memberflfi in its seat 17 in the valve 13, thus the valves will be held in closed position until sufficient pressure is exerted on either side to unseat Thus if there is a pre exerted against the valve 13, said valve will .be unseated, allowing fluid to pass out through the opening 3 behind the main gate valve, for which the present valve is intended as a relief, but when the main valve is opened, tending to force the fluid back through the passage 3, it will exert a preponderance of pressure on that side of the valve 13 and will .open the valve16 and close the valve 13. This position of the valves is shown in Fig. 3.

The valve 16 is .there unseated, allowing a passage of fluid through the opening 19.

This type of valve is designed particularly foi' use in a bypass of the character stated, but

it is obvious that it has a wide application. It may be closed manually so that it will not be ca able of automatic operation by screwing t e valve stem 8 inwardly into the position shown in Fig. 4:. The head 14 on the valve stem forces the valve member 13 to its seat to close the same and simultaneously closes the passage through the valve.

I have thus provided a valve which is normally closed but which may be opened by a predetermined fluid pressure in either direction, but which is also capable of being manually closed so as to prevent the passage of fluid in either direction. When this device is used with a fluid operated piston the fluid will pass through the passage 4 and open the valve 13 and be forced through the passage 3 behind the piston. When the piston is again forced into open position the fluid behind the piston may surge back through the passage 3 and open the valve 16 and from thence find an outlet through the passage 4.

This is one use to which the valve may be placed but I do not wish to be limited to such application.

What I claim is new and desire to protect by Letters Patent is: 1. In a valve structure having a fluid passage, a valve closing said passage in one direction, said valve having an opening there through, a closure for said opening normally seated, but adapted to automatically open in a direction opposite tothat of the valve, common means to support said valves adapted also to move said closure and valve into a closed position and prevent automatic opening thereof.

2. A valve structure having a valve chamber therein, a valve seat in said chamber, a valve stem projecting through said chamber, a valve slidable on said stem to fit said seat, said valve having a fluid passage therethrough, means normally closing said passage in all positions of said valve, and means to hold said valve rigidly in its seat.

3. A valve'structure having a fluid passage, a valve stem in said passage, a double acting valve member on said stem adapted to close said passage resiliently in both directions, said valve being adapted to automatically open under fluid pressure from either direction, and means operated by said stem to move against said valve member to prevent automatic opening thereof.

In testimony whereof I hereunto aflix my signature this 10 day of January A. D. 1929.

WALTER E. KING. 

